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What would be 1 hour equivalent on these moons of Jupiter and Saturn compared to earth? And their astrobiological implications

The difference will not be constant, since the Earth moves around the Sun the relative velocity of all of those bodies change. You might want to look into Barycentric Dynamic Time (TDB), which is ...
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2 votes
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What would be 1 hour equivalent on these moons of Jupiter and Saturn compared to earth? And their astrobiological implications

One Earth hour is equal to one hour on each of those moons, to a very high level of accuracy. Relativistic time dilation is a real and measurable thing, but you need extremely accurate clocks to ...
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3 votes

Measurement of Planetary Aberration (similar to stellar aberration)

As far as an authoritative source, as PM 2Ring pointed out in his comment, it is on Wikipedia, but no reference is cited. The definition itself seems to be incomplete, as it does little to actually ...
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5 votes

Measurement of Planetary Aberration (similar to stellar aberration)

I. The statement about planetary aberration quoted in the question, and for which the quesioner seeks some authority, wasn't actually called a 'definition' by the questioner : it's probably best ...
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2 votes

Do black holes "store" ancient light?

Infalling objects pass right through the event horizon. They don't freeze there. The vicinity of the event horizon is locally just like any other part of spacetime. If a light-emitting or light-...
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